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A. E. OSBORN.

INTERNAL COMBUSTIN HIGINE. Armcnrlou mm APR. 21|. ma.

Patented Sept. 2, `191).

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MfW/m ALDEN E. OSBOBN, 0F NEW YORK, N. Y.

INTEBNAL-COMBUSTION ENGINE.

Specification of Letters Patent.

Patented Sept. 2, 1919.

Original application filed September 22, 1916, Serial No. 121,532. Divided and this application led April 23,

' 1918. Serial No. 230,263.

To all 'w hom it may concern Be it known that I, ALDEN E. OsnoRN, a citizen of the United States of America, and a resident of New York, county of Bronx, and State of New York, United States of America, have invented certain new and usctul Improvements in Internal-Combustion Engines, of which the following is a specification, reference being had to the accompanying drawing, forming a part thereof.

My invention relates `to internal combustion engines. and has for one object to provide an engine that shall be simple in construction and reliab-le in operation.

In Patent No 1,212,391, issued to me January 16, 1917, an internal combustion engine is disclosed which has an intake port opening into the cylinder at an intermediate point in the piston stroke. which is opened and closed by the cooperation of the engine pis-ton and a valve.

Another object of this invention is to iinprove upon engines of this general character and to increase the power developed by the engine, by providing an additional admission port which is uncovered by the main. piston near the end of its working stroke, and which coperates with the intermediate port to impro-ve the operation of the engine. particularly for certain classes of service; as for example, for aviation purposes.

Other objects and advantages of my invention will be set forth hereinafter, and in order that my invention may be thoroughly understood, I will now proceed to describe the same in the following specification, and will then point out the novel features thereof in appended claims.

The drawing is a sectional elevation of an engine arranged and constructed in accordance with my invention and constituting an embodiment thereof. This comprises a cylinder 10 in whichl operates a piston 11, a crank case 12, a crank shaft 13, and a crank pin 141, and a connecting rod 18 between the piston and the crank pin. Between the cylinder and the piston is a sleeve valve 40 provided with through passages 41 and 4:2 and connected by a rod 19 with a valve crank 17.

The valve crank shaft 20 to which the valve crank 17 is secured is operatively connected to the crank shaft 13 by gears designated 21-22--23, the gears being so proportioned that the valve crank shaft is operated at one-halt' the speed of the crank shaft of the engine. Other means may, of course, be employed for this purpose.

The engine cylinder is provided with eX- haust ports 35 communicating with an exhaust passage 39, and also has intake ports 36 and 37 located respectively at a line intermediate the travel of the top of the pist0n and at a line just above the lower end of the travel of the top of the piston.

As shown in the drawing, I prefer to utilize a plurality of openings through the sleeve valve and through the cylinder' wall in order to increase the size of the effective admission openings.

The operation of the engine is as lfollows: In the drawing the parts are shown in the positions they occupy at the beginning of the working stroke and the crank shafts 13 and 20 are rotating in a counterolockwise direction as indicated by arrows. The exhaust port 35 is closed by the sleeve valve 40 and the valve passages 41 and 42 substantially register with the intake ports 36 and 37. During the working stroke the crank 17 moves through an angle of substantially 90 degrees and the sleeve valve moves outwardly a sufficient amount to close the ports 36 and 37 before they are uncovered by the piston. During the next quarter turn of the crank 17 or during the cxhau'st stroke of the engine the sleeve 40 is drawn down far enough to uncover the exhaust port 35 to permit the burnt gases to escape.

During the next stroke of the engine which is the suction stroke, the sleeve moves inwardly so as to close the exhaust port 3b and to bring its through passages 41 into register with the intake ports 36 and its through passages 42 into register with the intake ports 37, by the time they are uncovered by the piston 11.

Just at the end of the suction stroke the sleeve L10 has advanced sullicicntly to close the upper admission port 36 to prevent fuel being forced baekwardly during the next stroke of the engine whlch is the compression stroke. The lower port 37 is closed by the piston in the arrangement illustrated but if desired the sleeve may be arranged to close 'both of the admission ports. At the end of the compression stroke, the parts occulpy the positions in which they are shown in t c drawing.

'l`he two inlet ports 3G and 37 which are shown as connnunicating with a single inlet opening may be connected with Separate passages communicating with the same or different sources of gas supply, or one may (,-onnnunicate with the gas supply while the other opens into the air alone.

This application is a division oit' applicalion Serial No. 121,532 tiled by me September 22, 1916.

My invention obviously may be embodied in structures other than that illustrated, and I intend that only such limitations be imposed as are indicated in the appended claims` For example, the engine may be provided with an inverted head as shown in Fig. 3 of my aforesaid Patent 1,212,391.

What I claim is:

1. The combination in a four-cycle engine with the cylinder and its combustion chamber, of a sleeve slidable in the cylinder, a piston slidahle in the sleeve, an exhaust port provided in the cylinder and arranged to be opened and closed at properly timed intervals b v movement of the sleeve, and inlet ports provided in the cylinder at different levels, and all arranged below the combustion chamber, said inlet ports arranged to be opened and closed at properly timed intervals by movement of the sleeve and piston, all constructed and arranged so that when the explosion occurs all said inlet ports are below the head of the piston.

2. An internal combustion engine comprising a piston, a cylinder having three independent ports communicating therewith, one of `which is an intake port at an intermediate point in the piston stroke and materially above the outer end thereof and another of which is a second intake port near the outer end of the piston stroke, a reciprocatory sleeve valve between the piston land the cylinder, and means for actuating said sleeve valve to open said intermediate and end intake ports in conjuction with the piston during one outward stroke of the piston and to close both of said intake ports independently of the piston during another outward stroke of the piston.

3. An internal combustion engine comprising a cylinder having a combustion chamber at one end, a piston, an admission passage opening into the cylinder at an intermediate point in the piston stroke, a second admission passage opening into the cylinder near the outer end of the piston stroke, an exhaust port opening into the combustion chamber, a sleeve valve between the cylinder and the piston, and means for reciprocating said sleeve valve at one-half the speed of the main piston to independently control the exhaust port, to open both et' the admission passages in conjunction with the piston during the` suction stroke, and ro close one oi said passa es at the end of said suction stroke indepen ently of the piston.

4. An internal combustion engine comprising a cylinder having a combustion chamber at one end, a piston. an admission passage opening into the cylinder at an intermediate point in the piston stroke, a second admission passage opening into the cylinder near the outer end of the piston stroke, a sleeve valve between the cylinder and the piston, and means for actuating said sleeve valve to open the admission passages in conjunction with the piston during the suction stroke, and to close one of said passages independentlv of the piston during the compression stroke.

5. An internal combustion engine comprising a cvlinder having a combustion chamber at one end, a piston, an admission passage opening into the cylinder at an intermediate point in the piston stroke, a second admission passage opening into the cylinder near the outer end of the piston stroke, a sleeve valve between the cylinder and the piston, and means for actuating said sleeve valve to open the admission passages in conjunction with the piston during the suction stroke, and to close said intermediate passage independently of the piston during the compression stroke.

In Witness whereof, I have hereunto set my hand this 17 day of April, 1918,

ALDEN E. OSBORN.

Copies o! this patent may be obtained for ve cents each, by addressing the` Commissioner of Patents,

Washington, D. 0. 

